Wi-Fi

OSI-modellen med kendte protokoller.
De anvendes bl.a. på datanettene:
Fastnet og trådløst: WAN (f.eks. internettet), MAN, LAN, PAN.
Kun trådløst: IPN, WMAN, WLAN, WPAN (f.eks. Bluetooth).
Lag Lagnavn IP bårne/relaterede (har RFC)
7 Program HTTP, SMTP, POP3, IMAP, FTP, DNS, DHCP...
6 Præsentation AFP...
5 Session RPC, NetBIOS...
4 Transport TCP, UDP, RTP...
3 Netværk IP: (IPv4, IPv6), ICMP, IGMP, ARP...
2 Datalink Ethernet, HDLC, V.42bis, V.42(LAPM), V.44...
1 Fysisk V.34, V.90, ADSL, 802.11 Wi-Fi, WiMAX...
Wi-Fi (IEEE 802.11) generationer
Generation IEEE
standard
Vedtaget Forbindelses-
hastigheder
(Mbit/s)
Frekvens-
bånd

(GHz)
Wi-Fi 8[1] 802.11bn (2028?) op til 100.000 2.4, 5, 6
Wi-Fi 7 802.11be (2024) 1376–46120 2.4, 5, 6
Wi-Fi 6E 802.11ax 2020 574–9608[2] 6[a]
Wi-Fi 6 2019 2.4, 5
Wi-Fi 5 802.11ac 2014 433–6933 5[b]
Wi-Fi 4 802.11n 2008 72–600 2.4, 5
(Wi-Fi 3)* 802.11g 2003 6–54 2.4
(Wi-Fi 2)* 802.11a 1999 5
(Wi-Fi 1)* 802.11b 1999 1–11 2.4
(Wi-Fi 0)* 802.11 1997 1–2 2.4
*Wi‑Fi 0, 1, 2, and 3 er navngivet med tilbagevirkende kraft.
De findes ikke i den officielle nomenklatur.[3][4][5]

Wi-Fi (eller WiFi, Wifi, wifi), er et sæt standarder for trådløse datanet (f.eks. WLAN) baseret på IEEE 802.11-specifikationerne.

Wi-Fi-certificerede produkter kan benytte det officielle Wi-Fi logo, der indikerer at produktet kan fungere sammen med andre produkter, der ligeledes er Wi-Fi certificerede. En Wi-Fi-certificering gives af Wi-Fi Alliance, der bl.a. står for tests af Wi-Fi produkter.

  1. ^ Nov 13, 2024, pcworld.com: Meet Wi-Fi 8, which will trade speed for a more reliable experience Wi-Fi 7 will remain until 2028, when Wi-Fi 8 is expected to take over, backup Citat: "...Wi-Fi 8, known right now as IEEE 802.11bn Ultra High Reliability, still remains years away...The key phrase that you should think of in the context of Wi-Fi 8? Not peak throughput, but effective throughput...According to MediaTek, the actual peak throughput in a “clean,” or laboratory, environment is just 80 percent or so of the hypothetical peak throughput, and actual, real-world results can be far less...With Wi-Fi 8, the emphasis now appears to be on improving the overall user experience first and foremost..."
  2. ^ "MCS table (updated with 80211ax data rates)". semfionetworks.com.
  3. ^ Kastrenakes, Jacob (2018-10-03). "Wi-Fi Now Has Version Numbers, and Wi-Fi 6 Comes Out Next Year". The Verge. Hentet 2019-05-02.
  4. ^ Phillips, Gavin (18. januar 2021). "The Most Common Wi-Fi Standards and Types, Explained". MUO - Make Use Of. Arkiveret fra originalen 11. november 2021. Hentet 9. november 2021.
  5. ^ "Wi-Fi Generation Numbering". ElectronicsNotes. Arkiveret fra originalen 11. november 2021. Hentet 10. november 2021.


Fodnotefejl: <ref>-tags eksisterer for en gruppe betegnet "lower-alpha", men der blev ikke fundet et tilsvarende {{reflist|group="lower-alpha"}}, eller et afsluttende </ref>-tag mangler


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